Explore the FITS data model and API and map to functional data model and algebra

[dlindhol]

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[dlindhol]

We will use this information (in a new issue) to create an Adapter with an abstraction layer for reading data from FITS files. We will want to push down some Operations to the native API if it supports it.

[dlindhol]

From @lindholc

Here’s a service Rob Norris and the Gemini Observatory folks put together to make mosaic images using FITS files: https://github.com/gemini-hlsw/gsp-montage

They have abstract representations of the parts of FITS files they care about: https://github.com/gemini-hlsw/gsp-montage/blob/master/modules/core/src/main/scala/data/Table.scala

And they break their concerns (running external processes, fetching data, caching mosaics, etc.) into algebras: https://github.com/gemini-hlsw/gsp-montage/tree/master/modules/core/src/main/scala/algebra